package com.aotain.jupiter.flink;

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.util.Collector;

public class WindowWordCount {

	 public static void main(String[] args) throws Exception {

	        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

	        DataStream<Tuple2<String, Integer>> dataStream = env
	                .socketTextStream("localhost", 9999)
	                .flatMap(new Splitter())
	                .keyBy(0)
	                .timeWindow(Time.seconds(5))
	                .sum(1);

	        dataStream.print();

	        env.execute("Window WordCount");
	    }

	    public static class Splitter implements FlatMapFunction<String, Tuple2<String, Integer>> {
	        @Override
	        public void flatMap(String sentence, Collector<Tuple2<String, Integer>> out) throws Exception {
	            for (String word: sentence.split(" ")) {
	                out.collect(new Tuple2<String, Integer>(word, 1));
	            }
	        }
	    }

}
